@Tyberius Thanks! I actually wouldn't mind if you added an answer too, explaining it the way you just have, since I wouldn't have understood Susi's answer if it wasn't for your interpretation and added perspective. It would also bring us closer to 2 answers/day and add more ways for search engines to lead random people to our site.

@Tyberius @Thomas This answer: mattermodeling.stackexchange.com/a/1302/5 and this answer: mattermodeling.stackexchange.com/a/1991/5 are almost exactly the same (they even both start with the word "And" in the same way!). What are your thoughts about this?

I suppose that answer could also go here: mattermodeling.stackexchange.com/q/484/5, so then we will have the same (rather short) answer, in 3 different places.